Support structure



FIG. 1 is a front perspective view of a support structure according to the present invention;

FIG. 2 is a front view of the support structure of FIG. 1;

FIG. 3 is a rear view of the support structure of FIG. 1;

FIG. 4 is a top view of the support structure of FIG. 1;

FIG. 5 is a bottom view of the support structure of FIG. 1;

FIG. 6 is a left side view of the support structure of FIG. 1;

FIG. 7 is a right side view of the support structure of FIG. 1; and,

FIG. 8 is a rear perspective view of the support structure of FIG. 1.

The broken line showing of additional structure is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a support structure, as shown and described. 